H G Zandstra. (1981). A methodology for on-farm cropping systems research. Philippines: IRRI.
Trích dẫn kiểu ChicagoH G Zandstra. A Methodology for On-farm Cropping Systems Research. Philippines: IRRI, 1981.
MLA引文H G Zandstra. A Methodology for On-farm Cropping Systems Research. Philippines: IRRI, 1981.
警告:这些引文格式不一定是100%准确.